CN218096719U - Gas storage device, compressor system, refrigerating system and air conditioning unit - Google Patents

Abstract

The present disclosure relates to a gas storage device, compressor system, refrigerating system and air conditioning unit, wherein, gas storage device includes: the first opening is positioned in the area, close to the bottom surface, of the shell and used for introducing a first refrigerant in a gas-liquid mixed state at a first temperature; the second opening is positioned in the bottom area of the shell and used for allowing the liquid refrigerant separated from the first refrigerant to flow out; the third opening is positioned in the top area of the shell and used for allowing the gaseous refrigerant separated from the first refrigerant to flow out; and the heat exchanger is positioned in the shell and is arranged on the side wall of the shell, the heat exchanger is provided with a first flow channel, a fourth opening and a fifth opening, the fourth opening is communicated with the first flow channel, a second refrigerant with a second temperature is introduced into the first flow channel to exchange heat with the first refrigerant flowing through the heat exchanger, the fifth opening is used for allowing the second refrigerant after heat exchange to flow out, and the second temperature is higher than the first temperature.

Description

Gas storage device, compressor system, refrigerating system and air conditioning unit

Technical Field

The disclosure relates to the technical field of air conditioners, in particular to a gas storage device, a compressor system, a refrigeration system and an air conditioning unit.

Background

The best state of the air suspension bearing in the air suspension compressor is that all the air suspension bearings adopt gaseous refrigerants for air supply suspension, and under the theoretical condition, if all the air suspension bearings are suspended by the gaseous refrigerants, the suspension pressure at all positions can be kept consistent well, the bearing runs stably and has high precision, and the phenomenon of shaft vibration is avoided.

In the prior art that the inventor knows, air feeder often can not effectual separation gas-liquid state refrigerant, be mingled with more little liquid bead of refrigerant in the air feed of suspension bearing, because the air feed is impure, get into the bearing chamber because bearing chamber temperature is higher when little liquid bead of refrigerant, reach the phase transition point of refrigerant, little liquid bead of refrigerant will gasify into gaseous state refrigerant, the gasification of a little liquid bead is as playing the gas effect, can arouse local atmospheric pressure to explode and shake, a plurality of local atmospheric pressure explode and shake can arouse bearing intracavity atmospheric pressure unstability, and then lead to the bearing to shake the unstable precision of operation low, so not only lead to bearing self life-span to shorten, and probably because the unstable operation of axle, lead to parts such as axle and broach to interfere the wearing and tearing and damaging.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a gas storage device, a compressor system, a refrigeration system and an air conditioning unit, which can reduce the liquid content of a gaseous refrigerant separated from a gas-liquid mixed refrigerant.

According to a first aspect of the present disclosure, a gas storage device is provided, comprising:

the first opening is positioned in the area, close to the bottom surface, of the shell and used for introducing a first refrigerant in a gas-liquid mixed state at a first temperature; the second opening is positioned in the bottom area of the shell and used for allowing the liquid refrigerant separated from the first refrigerant to flow out; the third opening is positioned in the top area of the shell and used for allowing the gaseous refrigerant separated from the first refrigerant to flow out; and

the heat exchanger is positioned in the shell and is installed on the side wall of the shell, the heat exchanger is provided with a first flow channel, a fourth opening and a fifth opening, the fourth opening is communicated with the first flow channel, a second refrigerant with a second temperature is introduced into the first flow channel, the second refrigerant is in heat exchange with the first refrigerant flowing through the heat exchanger, the fifth opening is used for allowing the second refrigerant after heat exchange to flow out, and the second temperature is higher than the first temperature.

In some embodiments, the heat exchanger is disposed in a region of the housing proximate the top.

In some embodiments, the first opening is located on a side wall of the housing and spaced apart from a bottom surface of the housing, the second opening is located on the bottom surface of the housing, and the third opening is located on a top surface of the housing.

In some embodiments, the gas storage device further comprises:

and the liquid separation baffle is positioned in the shell, positioned between the heat exchanger and the first opening in the height direction of the gas storage device and configured to separate liquid refrigerants in the first refrigerants.

In some embodiments, a plurality of liquid separation baffles are arranged, the liquid separation baffles are arranged at intervals in the height direction, and two adjacent liquid separation baffles are arranged in a staggered manner in the horizontal plane.

In some embodiments, the heat exchanger is of a plate structure, and is provided with a second flow passage which penetrates through the heat exchanger in the height direction of the gas storage device, and the second flow passage is used for a first refrigerant in a gas-liquid mixed state to pass through.

In some embodiments, the inner wall of the second flow passage is provided with fins.

In some embodiments, the gas storage device further comprises:

and the electric heater is arranged in the bottom area outside the shell and is configured to selectively heat the liquid refrigerant separated from the first refrigerant at the bottom of the shell.

According to a second aspect of the present disclosure, there is provided a compressor system comprising:

a compressor including an air bearing; and

the gas storage device of the above embodiment;

the third opening is communicated with the air inlet path of the air suspension bearing and is configured to provide gaseous cooling medium for the air suspension bearing.

According to a third aspect of the present disclosure, there is provided a refrigeration system comprising:

the compressor system of the above embodiment;

the evaporator is configured to receive the liquid refrigerant flowing out of the second opening; and

the condenser is configured to provide a first refrigerant in a gas-liquid mixed state at a first temperature into the shell through the first opening.

In some embodiments, the condenser is further configured to provide a second refrigerant of a second temperature to the heat exchanger through the fourth opening.

In some embodiments, the condenser is further configured to provide a second refrigerant of a second temperature to the heat exchanger through the fourth opening.

In some embodiments, the refrigeration system further comprises: and the flash tank is configured to receive the second refrigerant flowing out of the fifth opening.

According to a fourth aspect of the present disclosure, an air conditioning unit is provided, which includes the air storage device of the foregoing embodiment, or the compressor system of the foregoing embodiment, or the refrigeration system of the foregoing embodiment.

Based on the technical scheme, the gas storage device of the embodiment of the disclosure can separate pure gaseous refrigerant from gas-liquid mixed refrigerant through the combination of gravity separation and superheated gasification, effectively separate and eliminate small liquid drops of refrigerant in gas supply, reduce the liquid content of the separated gaseous refrigerant, and provide pure refrigerant gas for subsequent equipment so as to improve the running stability of the subsequent equipment and system.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

FIG. 1 is a schematic diagram of the structure of some embodiments of the disclosed gas storage device;

fig. 2 is a schematic block diagram of some embodiments of the refrigeration system of the present disclosure.

Description of the reference numerals

1. A housing; 2. a heat exchanger; 3. a liquid separating baffle plate; 4. a compressor; 5. an evaporator; 6. a condenser; 7. a flash tank; 8. a throttle valve;

11. a first opening; 12. a second opening; 13. a third opening; 21. a first flow passage; 22. a second flow passage; 24. a fourth opening; 25. a fifth opening; 41. an air bearing; 81. a first orifice plate; 82. a second orifice plate; A. a first region; B. a second region; C. a third region; D. a fourth region; E. a fifth region; p1, an air supply passage; p2, an air return passage; p3, pathway for qi supply.

Detailed Description

The present disclosure is described in detail below. In the following paragraphs, the different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.

The terms "first", "second", and the like in the present disclosure are merely for convenience of description to distinguish different constituent elements having the same name, and do not denote a sequential or primary-secondary relationship.

In the description of the present disclosure, it is to be understood that the terms "inner", "outer", "upper" and "lower" and the like indicate orientations or positional relationships that are defined with reference to a housing, a flow passage, or the like, and are used merely for convenience in describing the present disclosure, and do not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present disclosure.

The present disclosure provides a gas storage device, as shown in fig. 1 and 2, including a housing 1 and a heat exchanger 2. The shell 1 is provided with a first opening 11, a second opening 12 and a third opening 13, wherein the first opening 11 is positioned in the area of the shell 1 close to the bottom surface and is used for introducing a first refrigerant in a gas-liquid mixed state at a first temperature; the second opening 12 is located in the bottom region of the housing 1, and is used for allowing the liquid refrigerant separated from the first refrigerant to flow out; the third opening 13 is located in a top region of the housing 1 for flowing out the gaseous refrigerant separated from the first refrigerant.

The heat exchanger 2 is located in the housing 1 and is installed on the side wall of the housing 1, the heat exchanger 2 has a first flow channel 21, and a fourth opening 24 and a fifth opening 25 which are communicated with the first flow channel 21, the fourth opening 24 is used for introducing a second refrigerant with a second temperature into the first flow channel 21 so as to exchange heat with the first refrigerant flowing through the heat exchanger 2, the fifth opening 25 is used for allowing the second refrigerant after heat exchange to flow out, and the second temperature is higher than the first temperature.

The housing 1 may have a cylindrical structure, such as a cylindrical or prismatic structure. The top of the casing 1 may be a structure gradually reduced from bottom to top, and the third opening 13 is disposed at the topmost position of the center, for example, the casing 1 is cylindrical, and the top of the casing 1 may be an arch structure, which is beneficial to guiding the gaseous refrigerant passing through the heat exchanger 2 to converge toward the middle area, so as to more smoothly flow out from the third opening 13.

Specifically, as shown in fig. 1, a first area a of the liquid storage device is located above the liquid refrigerant and below the heat exchanger 2, and the working medium in the first area a is a first refrigerant in a gas-liquid mixed state at a first temperature; the second area B is positioned in the bottom area of the shell 1, the working medium in the second area B is a liquid refrigerant separated from the first refrigerant, and the second area B can be called a liquid refrigerant area; the third area C is positioned between the upper part of the heat exchanger 2 and the top of the shell 1, the working medium in the third area C is pure gaseous refrigerant, the liquid content of the working medium in the third area C is lower than that of the working medium in the first area A, and the third area C can be called a gaseous refrigerant area; the working medium in the fourth area D, i.e. the first flow channel 21 of the heat exchanger 2, is the second refrigerant with the second temperature, and optionally, the second refrigerant may be in any phase, for example, in a liquid state.

Specifically, the first refrigerant of gas-liquid mixture attitude has partly endothermic change to the gaseous state in the twinkling of an eye through first opening 11 entering casing 1, another part is exothermic to become liquid, under the action of gravity, liquid refrigerant sinks to the liquid refrigerant district B of casing 1 bottom, gaseous refrigerant come-up, at gaseous refrigerant come-up to gaseous refrigerant district C's in-process, heat exchanger 2 heats gaseous refrigerant, the heat absorption of the little liquid pearl of floating in the gaseous refrigerant reaches the overheated state and all gasifies to gaseous refrigerant to reduce gaseous refrigerant's liquid content rate.

Specifically, the heat exchanger 2 is used for overheating and heating the gaseous refrigerant directly separated from the first refrigerant by the second refrigerant with a higher temperature, so that the floating globules in the gaseous refrigerant are heated to an overheated gasification state, and pure refrigerant gas is output to subsequent equipment through the third opening 13, thereby improving the stability of the operation of the subsequent equipment. Alternatively, the heat exchanger 2 may be any structure such as a tubular heat exchanger or a plate heat exchanger. Alternatively, the heat exchanger 2 may be disposed along a horizontal plane, or may be disposed at an angle to the horizontal plane. In order to allow the gas entering the housing 1 to exchange heat via the heat exchanger 2, the heat exchanger 2 covers the entire cross section of the housing 1 perpendicular to the height direction.

The gas storage device of this embodiment can separate pure gaseous state refrigerant from gas-liquid mixture state refrigerant through the mode that gravity separation and superheated gasification combined together, effectively separates and eliminates the refrigerant tiny liquid bead in the air feed, reduces the liquid content rate of the gaseous state refrigerant that separates from gas-liquid mixture state refrigerant, provides pure refrigerant gas to subsequent equipment to improve the stability of subsequent equipment and system operation.

In some embodiments, as shown in FIG. 1, the heat exchanger 2 is disposed in the area of the housing 1 near the top.

In the embodiment, the heat exchanger 2 is arranged in the area, close to the top, of the shell 1, so that the space below the heat exchanger 2 in the shell 1 can be fully utilized for gas-liquid separation under the action of gravity, the gas-liquid separation effect is improved, the liquid content of the gaseous refrigerant is further reduced, when the gaseous refrigerant reaches the area at the top of the shell 1, liquid drops contained in the gaseous refrigerant are less, and the requirement on the temperature of the second refrigerant can be reduced.

In some embodiments, as shown in fig. 1, the first opening 11 is located on a side wall of the housing 1 and spaced apart from a bottom surface of the housing 1, the second opening 12 is located on the bottom surface of the housing 1, and the third opening 13 is located on a top surface of the air reservoir.

Specifically, the first opening 11 and the bottom surface of the housing 1 are arranged at an interval, so that the liquid refrigerant separated from the first refrigerant can be prevented from flowing back through the first opening 11, the gas-liquid mixed refrigerant is prevented from contacting the liquid refrigerant in a larger area, the gas-liquid separation efficiency of the gas-liquid mixed refrigerant is improved, and the gas-liquid separation effect is optimized.

Specifically, the second opening 12 is provided on the bottom surface of the casing 1, and the liquid refrigerant separated from the first refrigerant can flow out through the second opening 12 in time, and can smoothly flow out even when the amount of the separated liquid refrigerant is small, thereby preventing excessive accumulation of the liquid refrigerant from reducing the gas-liquid separation efficiency of the gas-liquid mixed refrigerant.

Similarly, the third opening 13 is disposed on the top surface of the casing 1, and the gaseous refrigerant separated from the first refrigerant can flow out through the third opening 13 in time, so as to prevent excessive accumulation of the gaseous refrigerant from reducing the gas-liquid separation efficiency of the gas-liquid mixed refrigerant.

In this embodiment, by optimizing the positions of the first opening 11, the second opening 12, and the third opening 13 with respect to the casing 1, the gas-liquid separation efficiency of the gas-liquid mixed refrigerant can be improved, the liquid content of the separated gaseous refrigerant can be reduced, and the purity of the separated gaseous refrigerant can be improved.

In some embodiments, as shown in fig. 1, the gas storage device further includes: and the liquid separation baffle 3 is positioned in the shell 1, is positioned between the heat exchanger 2 and the first opening 11 in the height direction of the gas storage device, and is configured to separate liquid refrigerants in the first refrigerants.

Specifically, as shown in fig. 1, a first area a of the liquid storage device is located above the liquid refrigerant and below the liquid separation baffle 3, and the working medium in the first area a is a first refrigerant in a gas-liquid mixed state at a first temperature; the second area B is positioned in the bottom area of the shell 1, the working medium in the second area B is a liquid refrigerant separated from the first refrigerant, and the second area B can also be called a liquid refrigerant area; the fifth area E is positioned above the liquid separating baffle 3 and below the heat exchanger 2, the fifth area E can also be called a first gaseous refrigerant area, and the working medium in the fifth area E is a gaseous refrigerant separated from the first refrigerant; the third area C is positioned between the upper part of the heat exchanger 2 and the top of the shell 1 and can also be called as a second gaseous refrigerant area, the working medium in the third area C is pure gaseous refrigerant, and the liquid content of the gaseous refrigerant in the third area C is lower than that of the gaseous refrigerant in the fifth area E; the working medium in the fourth area D, i.e. the first flow channel 21 of the heat exchanger 2, is the second refrigerant at the second temperature, and optionally, the second refrigerant may be in any phase, for example, in a liquid state.

Specifically, the gaseous refrigerant separated from the gas-liquid mixed refrigerant inevitably mixes with a part of floating refrigerant small liquid beads in the floating process, and in the process that the gaseous refrigerant with high liquid content rises through the liquid separating baffle 3, most of the floating refrigerant small liquid beads with large volume are adsorbed on the liquid separating baffle 3 and separated from the gaseous refrigerant.

Specifically, the liquid separating baffle 3 is positioned between the heat exchanger 2 and the first opening 11 in the height direction, a part of a gas-liquid mixed first refrigerant absorbs heat and becomes gaseous, the gaseous refrigerant firstly passes through the liquid separating baffle 3 in the rising process, and small floating refrigerant liquid beads with large volume can be adsorbed on the liquid separating baffle 3, so that the liquid content of the gaseous refrigerant is reduced; then the gaseous refrigerant passes through the heat exchanger 2, the heat exchanger 2 heats the gaseous refrigerant, and the floating small liquid beads in the gaseous refrigerant can absorb heat to achieve an overheated state and are completely gasified into the gaseous refrigerant, so that the liquid content of the gaseous refrigerant is further reduced.

Alternatively, the liquid separating baffle 3 may be disposed along the horizontal plane, or may be disposed at an angle with respect to the horizontal plane, for example, at an angle inclined downward to promote the small liquid beads on the liquid separating baffle to fall to the liquid refrigerant zone B. Optionally, the separating baffle 3 may also be provided with a turbulent flow structure such as fins to further promote the separation of the small liquid beads of the floating refrigerant.

The liquid separating baffle 3 of the embodiment can separate a part of floating small liquid beads in the floating process of the gaseous refrigerant, thereby improving the gas-liquid separation effect of the gas storage device and reducing the liquid content of the gaseous refrigerant.

In some embodiments, as shown in fig. 1, the liquid separation baffle 3 is provided in plurality, the liquid separation baffles 3 are arranged at intervals in the height direction, and two adjacent liquid separation baffles 3 are staggered in the horizontal plane.

Alternatively, the plurality of separating baffles 3 may be arranged horizontally, or may be disposed at an angle to the horizontal plane, for example, the plurality of separating baffles 3 are all disposed obliquely downward at an angle to the horizontal plane.

The plurality of liquid separating baffles 3 of the embodiment are arranged at intervals in the height direction, and the two adjacent liquid separating baffles 3 are arranged in a staggered manner in the horizontal plane, so that the flow of the gaseous refrigerant in the liquid separating baffle 3 flow channel can be prolonged, the probability that the floating small liquid beads are adsorbed on the liquid separating baffles 3 is increased, the gas-liquid separation effect of the gas storage device is improved, and the liquid content rate of the gaseous refrigerant is reduced.

In some embodiments, as shown in fig. 1, the heat exchanger 2 is a plate structure, and a second flow channel 22 is disposed through the heat exchanger 2 in a height direction of the gas storage device, and the second flow channel 22 is used for passing a gaseous refrigerant separated from the first refrigerant.

Optionally, a plurality of second flow passages 22 are distributed on the heat exchanger 2, and the plurality of second flow passages 22 may be uniformly arranged. The second flow passages 22 may be vertically arranged to reduce resistance to the upward flow of the gas, or may be obliquely arranged.

Specifically, the cavity between the outer wall of the heat exchanger 2 and the side wall of the second flow channel 22 forms the first flow channel 21, so that the first flow channel 21 with a larger volume is formed, the throughput of the second refrigerant can be increased, the heat exchange efficiency can be increased, and moreover, the first flow channel 21 can surround the second flow channel 22 in the whole circumferential direction of each second flow channel 22, so that the heat exchange uniformity can be improved, and the vaporization of liquid droplets in the gaseous refrigerant can be accelerated. Specifically, the second flow channel 22 is used for communicating the area E and the area C, and is used for allowing the gaseous refrigerant to pass through and exchange heat, so that the liquid content of the gaseous refrigerant in the area C is lower than that in the area E.

The second flow channel 22 of this embodiment enables the gaseous refrigerant separated from the first refrigerant to exchange heat through the heat exchanger 2, so that the floating small liquid beads in the gaseous refrigerant are heated to a superheated and gasified state, and the gas storage device outputs a purer refrigerant gas to subsequent equipment, thereby improving the stability of the subsequent equipment in operation.

In some embodiments, the inner walls of the second flow passage 22 are ribbed.

The fins of the embodiment can increase the heat exchange efficiency between the gaseous refrigerant in the second flow channel 22 and the second refrigerant in the first flow channel 21, and further reduce the liquid content of the gaseous refrigerant, so as to provide purer refrigerant gas for subsequent equipment.

In some embodiments, the gas storage device further comprises:

and the electric heater is arranged in the bottom area outside the shell 1 and is configured to selectively heat the liquid refrigerant separated from the first refrigerant at the bottom of the shell 1.

Specifically, the electric heater can be used for heating the liquid refrigerant at the bottom of the shell 1, so that the liquid refrigerant is evaporated and gasified to be gas, and the pressure of the gaseous refrigerant in the shell 1 is increased, so that the gas supply pressure meets the requirement required by subsequent equipment. Alternatively, the electric heater may be used during initial start-up of the device or system.

The electric heater of this embodiment can raise the air pressure in the housing 1 at the initial stage of starting up the device or system, increasing the smoothness and stability of subsequent device activation.

Secondly, as shown in fig. 2, the present disclosure provides a compressor system, including:

a compressor 4 including an air bearing 41; and

the gas storage device of the above embodiment;

the third opening 13 communicates with the air intake passage of the aero bearing 41, and is configured to supply the gaseous refrigerant to the aero bearing 41.

In particular, the compressor 4 is an air-suspension compressor. Specifically, the gaseous refrigerant separated from the first refrigerant flowing out of the third opening 13 is supplied to the gas suspension bearing of the compressor 4. More specifically, the heat exchanger 2 of the gas storage device is used for overheating and heating the gaseous refrigerant directly separated from the first refrigerant by the second refrigerant with higher temperature, so that the floating small liquid beads in the gaseous refrigerant are heated to an overheated and gasified state, and pure refrigerant gas is output to the gas suspension bearing 41 through the communication between the third opening 13 and the gas inlet path, thereby improving the operation stability of the compressor 4.

Optionally, the third opening 13 may be located at a highest position of the top surface of the casing 1, so as to supply the pure gaseous refrigerant in the casing 1 to the gas suspension bearing 41 of the compressor 4 for suspension use through the third opening 13 in time, thereby preventing excessive accumulation of the gaseous refrigerant from reducing the gas-liquid separation efficiency of the first refrigerant in a gas-liquid mixed state.

The gas storage device in the compressor system of this embodiment passes through the mode that gravity separation and superheated gasification combined together, can separate out pure gaseous state refrigerant from gas-liquid mixture attitude refrigerant, effectively separate and eliminate the coolant globule in the air feed, the atmospheric pressure stability of the bearing chamber of gas suspension bearing 41 is kept, it shakes and quivers with the operation unstability to reduce the bearing, promote the operating stability of axle, improve the running accuracy of axle, and then can improve the reliability and the stability of compressor 4 and motor, realize compressor system's high-efficient steady operation.

Again, as shown in fig. 2, the present disclosure provides a refrigeration system comprising:

the compressor system of the above embodiment;

an evaporator 5 configured to receive the liquid refrigerant flowing out of the second opening 12; and

the condenser 6 is configured to supply a first refrigerant in a gas-liquid mixed state at a first temperature into the casing 1 through the first opening 11.

Specifically, the refrigerant inside the shell tube of the condenser 6 is layered, and the first refrigerant in the gas-liquid mixed state can be taken out from a position corresponding to the height of the gas-liquid mixed state, for example, the middle lower part of the condenser 6.

Optionally, the first opening 11 may be located at a middle-lower portion of the housing 1, and may be spaced from the bottom surface of the housing 1 by a certain distance, so as to introduce the first refrigerant in a gas-liquid mixed state from the condenser 6, so that the liquid refrigerant separated from the first refrigerant can be prevented from flowing back to the condenser 6 through the first opening 11, and the gas-liquid separation efficiency of the gas-liquid mixed state refrigerant can be improved, thereby improving the stability and the operation efficiency of the refrigeration system.

Optionally, the second opening 12 may be located at a lowest position of the bottom surface of the casing 1, and the liquid refrigerant separated from the first refrigerant can be timely led back to the evaporator 5 through the second opening 12 to continue to participate in the refrigeration cycle, so that excessive accumulation of the liquid refrigerant is avoided, the gas-liquid separation efficiency of the gas-liquid mixed refrigerant is reduced, and the stability of the refrigeration system is further improved.

Specifically, the condenser 6 provides a first refrigerant in a gas-liquid mixed state at a first temperature to the gas storage device, and after gas-liquid separation is completed in the gas storage device through gravity, the heat exchanger 2 performs overheating heating on a gaseous refrigerant separated from the first refrigerant, so that floating small liquid beads in the gaseous refrigerant are heated to an overheating gasification state, and pure refrigerant gas is output to the gas suspension bearing 41 of the compressor 4 through the third opening 13; the liquid refrigerant separated from the first refrigerant flows to the evaporator 5 through the second opening 12, and continues to participate in the refrigeration cycle.

According to the refrigeration system, the condenser 6 is used for providing the first refrigerant for the gas storage device, the evaporator 5 is used for receiving the liquid refrigerant flowing out of the second opening 12, refrigerant working media in the refrigeration system can be fully utilized, an additional gas supply source is not needed, and the stability of the refrigeration system can be effectively improved.

In some embodiments, as shown in fig. 2, the condenser 6 is further configured to provide the second refrigerant of the second temperature to the heat exchanger 2 through the fourth opening 24.

Specifically, the refrigerant inside the shell and tube of the condenser 6 is layered, the second refrigerant may be a high-temperature and high-pressure liquid refrigerant, and the liquid second refrigerant may be taken out from a position corresponding to the height of the liquid refrigerant inside the condenser 6, for example, a middle-lower portion of the condenser 6.

Specifically, the fourth opening belongs to the entrance point of heat exchanger 2, can introduce the second refrigerant in condenser 6 in heat exchanger 2 with contain the gaseous state refrigerant that the liquid rate is high and carry out the heat transfer, when satisfying the heat transfer demand, need not additionally to consume the electric energy, can energy saving and improve economic nature.

The refrigeration system of the embodiment provides the second refrigerant with the second temperature to the heat exchanger 2 through the condenser 6, so that the requirement of overheating and heating the gaseous refrigerant directly separated from the first refrigerant can be met, the energy consumption can be saved, and the economical efficiency can be improved.

In some embodiments, as shown in fig. 2, the refrigeration system further comprises: and a flash tank 7 configured to receive the second refrigerant flowing out of the fifth opening 25.

Specifically, the fifth opening 25 belongs to the outlet end of the heat exchanger 2, and can guide the second refrigerant with the reduced temperature after heat exchange to the flash evaporator 7 for primary throttling flash evaporation, so that the energy efficiency of the refrigeration system is improved. More specifically, the liquid globules in the shell 1 change into gas state to absorb heat, and can absorb the heat of the second refrigerant in the heat exchanger 2 in the heat exchange process, so that the high-temperature and high-pressure liquid in the heat exchanger 2 can be well cooled.

The refrigerating system of this embodiment can enough satisfy to carry out the energy saving and consumption reduction to the gaseous refrigerant when carrying out overheated heating from the gaseous refrigerant through leading the second refrigerant of heat exchanger 2 export to flash tank 7, can also make full use of gaseous refrigerant to cool down the second refrigerant in the heat exchanger 2 to improve refrigerating system's efficiency and stability.

In some embodiments, as shown in fig. 2, the flash tank 7 is configured to receive gaseous cooling medium flowing from the aero-suspension bearing 41.

In this embodiment, the gaseous refrigerant flowing out of the aerostatic bearing 41 flows to the flash tank 7 for throttling and flashing, so that the energy efficiency and the stability of the refrigeration system can be improved.

In some specific embodiments, as shown in fig. 1 and fig. 2, the refrigeration system includes a gas storage device, a compressor 4, an evaporator 5, a condenser 6, a flash evaporator 7 and a throttling element 8, the gas storage device includes a shell 1, a heat exchanger 2 and a liquid separation baffle 3, the compressor 4 includes an air suspension bearing 41, a first throttling orifice 81 is disposed on an inlet branch of the flash evaporator 7, and a second throttling orifice 82 is disposed on an outlet branch.

Specifically, the number of the first orifice plates 81 is three, one is located on a connecting path between the condenser 6 and the flash tank 7, one is located on a connecting path between the fifth opening 25 and the flash tank 7, and the other is located on a connecting path between the air-suspending bearing 41 and the flash tank 7; the second orifice 82 is located on a connection path between the flash evaporator 7 and the evaporator 5, and the refrigerant flowing out of the flash evaporator 7 can flow into the evaporator 5 through secondary throttling so as to improve the energy efficiency of the system.

Specifically, the refrigeration system includes a gas supply passage P1, a gas return passage P2, and a gas supplement passage P3, wherein the gas supply passage P1 is configured to supply pure gaseous refrigerant to the gas suspension bearing 41 through the third opening 13; the return air passage P2 is configured to receive the flash tank as a gaseous refrigerant flowing out of the aerosol bearing 41; the air supply passage P3 is configured to supply air to the flash tank 7 between the first-stage compressor and the second-stage compressor of the compressor 4, so as to improve the compression efficiency of the second-stage compressor, and thus to improve the overall compression efficiency of the compressor 4, thereby improving the overall energy efficiency of the refrigeration system.

More specifically, in the refrigeration system, the first opening 11 has a temperature of about 55 ℃; the temperature of the second opening 12 is about 45 ℃; the temperature of the third opening 13 is about 53-55 ℃; the temperature of the fourth opening 24 is about 65-68 ℃; the temperature of the fifth opening 25 is about 62-65 ℃.

Specifically, part of the workflow in the refrigeration system of this embodiment is as follows:

a first refrigerant in a gas-liquid mixed state introduced by the condenser 6 enters the shell 1 from the first opening 11; at the moment of entering the liquid storage device, one part of the first refrigerant in a gas-liquid mixed state absorbs heat to be in a gas state, the other part releases heat to be in a liquid state, the liquid refrigerant sinks to a liquid refrigerant area B at the bottom of the shell 1 under the action of gravity, and the liquid refrigerant is guided back to the evaporator 5 through the second opening 12 to continuously participate in the refrigeration cycle; the gaseous refrigerant floats upwards, small floating refrigerant liquid beads are inevitably mixed in the floating process of the gaseous refrigerant, and when the gaseous refrigerant rises and passes through the liquid separating baffle 3, most of the small floating refrigerant liquid beads with larger volume can be adsorbed into the liquid separating baffle and separated out; some small floating liquid beads with smaller volume may also rise to the first gaseous refrigerant region E along with the gaseous refrigerant, at this time, the small floating liquid beads continue to rise along with the gaseous refrigerant and pass through the second flow channel 22 of the heat exchanger 2, in the process of passing through the first flow channel 21, the heat exchanger 2 performs overheating heating and heat exchange on the small floating liquid beads and the gaseous refrigerant together, so that the small floating liquid beads absorb heat to reach an overheated state, phase change is completely gasified into the gaseous refrigerant, the liquid content of the gaseous refrigerant is reduced, the second gaseous refrigerant region C is made to be pure gaseous refrigerant, and finally the gaseous refrigerant supplies gas to the gas suspension bearing 41 of the compressor 4 from the third opening 13.

In the embodiment, the gaseous refrigerant separated by the gas storage device does not exist in various small liquid beads of the refrigerant, so that when the gaseous refrigerant is supplied to the gas suspension bearing 41, local air pressure explosion vibration cannot be caused, air pressure in the bearing cavity cannot be unstable even if the local air pressure explosion vibration does not exist, further unstable operation and low precision caused by vibration of the bearing are avoided, the service life of the bearing can be effectively prolonged, the operation precision and stability of the shaft are improved, and further the stability and the working efficiency of a refrigeration system are improved.

Specifically, a high-temperature high-pressure liquid second refrigerant introduced by the condenser 6 enters the first flow channel 21 of the heat exchanger 2 through the fourth opening 24, the floating small liquid beads are doped in the gaseous refrigerant in the shell 1 and pass through the second flow channel 22 of the heat exchanger 2, heat exchange is performed between the two working media, the heat exchanger 2 performs overheating heating on the floating small liquid beads and the gaseous refrigerant, the temperature of the second refrigerant in the first flow channel 21 is reduced, the second refrigerant flows to the flash evaporator 7 through the fifth opening 25 to perform primary throttling flash evaporation, and then the second refrigerant continues to participate in the refrigeration cycle, wherein the second refrigerant passes through the first throttling orifice plate 81 in the process of flowing to the flash evaporator 7. Specifically, the gaseous refrigerant flowing out of the air bearing 41 also flows to the flash tank 7 through the first orifice plate 81 for throttling and flashing so as to improve the energy efficiency of the system.

The first refrigerant in a gas-liquid mixed state in the embodiment is taken from the condenser 6, and an additional gas supply source is not required, so that the cost can be saved, and the stability of the refrigerating system can be improved; the second refrigerant with high temperature and high pressure in the heat exchanger 2 of the embodiment is taken from the condenser 6, so that the heat exchange requirement can be met, and the energy consumption can be reduced.

In this embodiment, the cooled second refrigerant flows to the flash evaporator 7 through the fifth opening 25 for throttling and flashing, the gaseous refrigerant flowing out of the gas suspension bearing 41 flows to the flash evaporator 7 for flashing, the liquid refrigerant in the housing 1 flows to the evaporator through the second opening 12, and the three paths flowing out of the gas storage device enable the refrigerant to continue to participate in the refrigeration cycle, so that the energy efficiency and the stability of the refrigeration system are improved.

In addition, the disclosure also provides an air conditioning device, which comprises the air storage device, the compressor system or the refrigeration system of the above embodiment.

The air conditioner of this embodiment utilizes the gas storage device to pass through gravity separation and superheated gasification etc. mode that combines, can separate pure gaseous state refrigerant from gas-liquid mixture state refrigerant, effectively separates and eliminates the refrigerant tiny liquid bead in the air feed, reduces the liquid content of the gaseous state refrigerant of separating from gas-liquid mixture state refrigerant, provides pure refrigerant gas to follow-up equipment (for example gas suspension bearing 41 etc.), can improve the stability of follow-up equipment operation, and then improves air conditioner's operating stability and complete machine efficiency.

In addition, the present disclosure also provides a control method of a refrigeration system based on the above embodiment, where the gas storage device further includes an electric heater disposed at the outer bottom of the housing 1, and the control method includes:

before the compressor 4 is started, the electric heater is started to heat the liquid refrigerant so as to increase the pressure of the gaseous refrigerant;

starting the compressor 4 under the condition that the pressure of the gaseous refrigerant reaches a first preset pressure;

in case the pressure of the condenser 6 is increased to a second preset pressure, the electric heater is turned off;

wherein the second preset pressure is greater than the first preset pressure.

Specifically, the first preset pressure is a pressure required for the operation of the air bearing 41, and the second preset pressure is a pressure required for the normal operation of the condenser 6.

Specifically, in the control method, the electric heater is only started when the unit is started, and because the high pressure does not exist in the condenser 6 and the high-pressure gaseous refrigerant does not exist in the gas storage device when the unit is not started, the gas supply to the gas suspension bearing 41 cannot be realized, and the bearing cannot suspend the compressor 4, so that the starting and the rotation cannot be realized, and the refrigeration cycle cannot be established.

Specifically, the electric heater is arranged at the bottom of the gas storage device, and can be used for heating the liquid refrigerant in the second area B at the bottom of the shell 1 before the compressor 4 is started, so that the liquid refrigerant is evaporated and gasified into the gaseous refrigerant, the air pressure of the third area C in the shell 1 is increased to the first preset pressure, so that the air supply pressure meets the working requirement of the air suspension bearing 41, the compressor 4 is started to rotate, when the condenser 6 establishes the normal working pressure, namely the second preset pressure, the pressure of the pure gaseous refrigerant flowing out from the third opening 13 of the gas storage device is enough to support the air suspension bearing 41, the electric heater is turned off at the moment, and the electric heater does not need to be turned on again in the subsequent operation process of the whole machine.

The control method of the embodiment can rapidly increase the pressure of the gaseous refrigerant by using the liquid refrigerant at the bottom of the gas storage device at the initial starting stage of the refrigeration system, so that the gas supply pressure meets the working requirement of the gas suspension bearing 41, no additional gas supply source or equipment is needed, the starting smoothness and stability of the compressor system can be improved, and the running stability of the refrigeration system is further increased.

The above detailed descriptions of the gas storage device, the compressor system, the refrigeration system and the air conditioning unit provided by the present disclosure are provided. The principles and embodiments of the present disclosure are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present disclosure. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present disclosure without departing from the principle of the present disclosure, and such improvements and modifications also fall within the scope of the claims of the present disclosure.

Claims (14)

1. A gas storage device, comprising:

the refrigerant gas-liquid mixing device comprises a shell (1), wherein a first opening (11), a second opening (12) and a third opening (13) are formed in the shell (1), the first opening (11) is located in a region, close to the bottom surface, of the shell (1) and used for introducing a first refrigerant in a gas-liquid mixing state at a first temperature; the second opening (12) is positioned in the bottom area of the shell (1) and is used for allowing the liquid refrigerant separated from the first refrigerant to flow out; the third opening (13) is positioned in the top area of the shell (1) and is used for allowing the gaseous refrigerant separated from the first refrigerant to flow out; and

the heat exchanger (2) is located in the shell (1) and is installed on the side wall of the shell (1), the heat exchanger (2) is provided with a first flow channel (21), a fourth opening (24) and a fifth opening (25) which are communicated with the first flow channel (21), the fourth opening (24) is used for introducing a second refrigerant with a second temperature into the first flow channel (21) so as to exchange heat with the first refrigerant flowing through the heat exchanger (2), the fifth opening (25) is used for allowing the second refrigerant after heat exchange to flow out, and the second temperature is higher than the first temperature.

2. Gas storage device according to claim 1, characterized in that the heat exchanger (2) is arranged in the area of the housing (1) near the top.

3. Gas storage device according to claim 1, wherein the first opening (11) is located on a side wall of the housing (1) and is spaced from a bottom surface of the housing (1), the second opening (12) is located on the bottom surface of the housing (1), and the third opening (13) is located on the top surface of the housing (1).

4. The gas storage device of claim 1, further comprising:

the liquid separation baffle (3) is positioned in the shell (1), is positioned between the heat exchanger (2) and the first opening (11) in the height direction of the gas storage device, and is configured to separate liquid refrigerants in the first refrigerants.

5. The gas storage device according to claim 4, wherein a plurality of liquid separation baffles (3) are provided, the plurality of liquid separation baffles (3) are arranged at intervals in the height direction, and two adjacent liquid separation baffles (3) are staggered in the horizontal plane.

6. Gas storage device according to any one of claims 1 to 5, wherein the heat exchanger (2) is of a plate-type structure, and a second flow passage (22) is provided that extends through the heat exchanger (2) in a height direction of the gas storage device, the second flow passage (22) allowing gaseous refrigerant separated from the first refrigerant to pass therethrough.

7. Gas storage device according to claim 6, characterized in that the inner walls of the second flow channels (22) are provided with fins.

8. A gas storage device according to any of claims 1 to 5, further comprising:

the electric heater is arranged in the bottom area outside the shell (1) and is configured to selectively heat the liquid refrigerant separated from the first refrigerant at the bottom of the shell (1).

9. A compressor system, comprising:

a compressor (4) comprising an air bearing (41); and

a gas storage device according to any one of claims 1 to 8;

wherein the third opening (13) is communicated with an air inlet path of the air suspension bearing (41) and is configured to provide gaseous refrigerant to the air suspension bearing (41).

10. A refrigeration system, comprising:

the compressor system of claim 9;

an evaporator (5) configured to receive the liquid refrigerant flowing out of the second opening (12); and

a condenser (6) configured to supply a first refrigerant in a gas-liquid mixed state at the first temperature into the casing (1) through the first opening (11).

11. A refrigeration system according to claim 10, characterized in that the condenser (6) is further configured to provide a second refrigerant of the second temperature to the heat exchanger (2) through the fourth opening (24).

12. The refrigeration system as recited in claim 10 or 11, further comprising: a flash tank (7) configured to receive the second refrigerant flowing out of the fifth opening (25).

13. A refrigeration system according to claim 12, characterized in that the flash tank (7) is configured to receive the gaseous cooling medium flowing out of the aerostatic bearing (41).

14. An air conditioning unit comprising a gas storage device according to any one of claims 1 to 8, or a compressor system according to claim 9, or a refrigeration system according to any one of claims 10 to 13.

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